Thank you, The numbers seem higher than expected, did you calculate for you machine

Strange I search many times and could not find a Calculator for filament speed. Then saw your Web copied the "RepRap Max Printing Speed Calculator"
and many came up. O found this one that is easier to understand.

I when you hovering over the Print speed in Cura a number appear in a pop up box mine was (" 9.6mm^3 per sec / 3.99 mm/s ") and was told that this number Quote "how is that even useful ? lol",

Well every one says they print at XXX speed percent this number is useless without knowing how much filament is being printed per sec.
So when someone asks the Speed, we should use this Speed reference Print Speed Calculator this way we are all on the same calibration and can compare how our 3D Printer compares with others.